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Finding the Fourth Proportional to 32,991.20, 49,419.60 and 20,472.80

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Solution

The fourth proportional to 32,991.20, 49,419.60 and 20,472.80 is: 30,667.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,991.20 : 49,419.60 = 20,472.80 : x
  2. Step 2: Convert to fraction form
    32,991.20/49,419.60 = 20,472.80/x
  3. Step 3: Cross multiply
    32,991.20x = 49,419.60 × 20,472.80
  4. Step 4: Simplify right side
    32,991.20x = 1,011,757,586.88
  5. Step 5: Solve for x
    x = 1,011,757,586.88/32,991.20
  6. Step 6: Final answer
    x = 30,667.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.